-84.74% is the change from 321 to 49
Calculation steps:
[( 49 - 321 ) ÷ 321] x 100 = -84.74%
Formula
Percentage change = [(49 - 321) / 321] x 100
Subtract the new number by the original number
49 - 321 = -272
-272 ÷ 321 = -0.8473520249221184
-0.8473520249221184 x 100 = -84.74%